Cylindrical Chamber
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Optical Fiber Spool Acoustic Wave Resonances Employing a Mach-Zehnder Interferometer in Vacuum Chamber
Abstract The longitudinal, flexural, and torsional modes of acoustical resonances are presented for a long and small thickness cylindrical fiber spool. The fiber spool is built using a monomode optical fiber tightly wound in a helix form around a cylindrical Styropor. The acoustical resonance values are obtained using a Mach Zehnder interferometer with the f
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-12
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2. Theoretical and Experimental Heat Transfer in Solid Propellant Rocket Engine
ABSTRACT: Accurate determination of heat flux is an important task not only in the designing aspect, but also in the performance analysis of rocket engines. In this purpose, this work deals with the heat flux determination in a combustion chamber through the inverse method. In this approach, the transient heat flux is determined from the experimental tempera
J. Aerosp. Technol. Manag.. Publicado em: 26/08/2019
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3. Kinetics drying of silver banana (Musa spp.) in hybrid dryer
RESUMO A busca pela redução de custos de produção e diversificação de comercialização de produtos agrícolas torna-se necessária para autonomia e aumento de renda dos produtores rurais. A utilização de secadores solares para produção de frutas secas consiste em excelente alternativa a ser adotada. No entanto, para a introdução desta tecnologia
Rev. Ciênc. Agron.. Publicado em: 04/07/2019
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4. Monitoração de doses em radiologia: a calibração de medidores do produto kerma-área (PKA)
Objective The authors have sought to study the calibration of a clinical PKA meter (Diamentor E2) and a calibrator for clinical meters (PDC) in the Laboratory of Ionizing Radiation Metrology at Instituto de Energia e Ambiente - Universidade de São Paulo. Materials and Methods Different qualities of both incident and transmitted beams were utilized in condi
Radiol Bras. Publicado em: 2013-12
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5. Effect of temperature on the mechanical properties of polymer mortars
This paper presents the results of an experimental program to investigate the effect of temperature on the performance of epoxy and unsaturated polyester polymer mortars (PM). PM is a composite material in which polymeric materials are used to bond the aggregates in a fashion similar to that used in the preparation of Portland cement concrete. For this purpo
Materials Research. Publicado em: 07/08/2012
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6. Ultrastructural and functional aspects of the spermatheca in the american harlequin bug, Murgantia histrionica (Hemiptera: Pentatomidae)
The spermatheca of Murgantia histrionica (Hahn) was investigated using fluorescence, scanning and transmission electron microscopy. The aim of the study was to elucidate the structure of this organ, pointing out differences between mated and unmated females. Results have shown an elaborated cuticular structure associated with muscular and glandular tissues.
Neotropical Entomology. Publicado em: 2011-04
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7. Simulação numérica do processo de combustão de metano em um queimador cilíndrico / Numerical simulation of combustion of methane in cylindrical burner
Este trabalho consiste na simulação numérica da combustão em uma câmara cilíndrica (queimador) para um jato concêntrico de combustível e ar, usando um software comercial baseado no Método dos Volumes Finitos. O combustível em análise é metano. As reações de formação de compostos NOX não são consideradas, assim como fenômenos de radiação.
Publicado em: 2010
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8. Development of a aggregation source for metallic nano-clusters / Desenvolvimento de uma fonte de nano-agregados metalicos
Nanosystems are one of the most important fields of research in the current days, mainly motivated by their technological potential. This size regime present new and unexpected properties that strongly differ from their macroscopic counter-part. This happen mainly due to effects arising from their high surface-to-bulk ratio and because their sizes are compar
Publicado em: 2009
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9. Difusão e sorção do isotiocianato alilo e o seu efeito no controle de Sitophilus zeamais e na qualidade do milho / Diffusion and sorption of allyl isothiocyanate and its effect on the control of Sitophilus zeamais and quality of maize
This study was done to evaluate allyl isothiocyante (AITC) transport through the grain bulk of maize, and determine its fumigant effect on different developmental phases of Sitophilus zeamais Motsch. (Coleoptera: Curculionidae) and on maize quality. The study was done in three steps at the Universidade Federal de Viçosa, in Viçosa, MG. In the first, the AI
Publicado em: 2008
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10. A numerical investigation of the aerodynamics of a furnace with a movable block burner
In this work the air flow in a furnace was computationally investigated. The furnace, for which experimental test data are available, is composed of a movable block burner connected to a cylindrical combustion chamber by a conical quarl. The apertures between the movable and the fixed blocks of the burner determine the ratio of the tangential to the radial a
Brazilian Journal of Chemical Engineering. Publicado em: 2007-06
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11. Fruit, seed and seedling characterization and embryo culture of physic nut (Jatropha curcas L.) / CaracterizaÃÃo de Frutos, Sementes e PlÃntulas e Cultivo de EmbriÃes de PinhÃo Manso (Jatropha curcas L.)
Physic nut has a medical and economical importance due to its pharmaceutical properties and increasing interest in fuel industry for biodiesel production, respectively. To be able to attend an increasing demand for Jatropha curcas L. seedlings and to better understand the species, this work aimed to describe its fruit and seed morphologies, its seedling deve
Publicado em: 2007
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12. UtilizaÃÃo do dosÃmetro Fricke para dosimetria de mÃquinas teleterapÃuticas, irradiadores gammacel e aparelhos de raios-X superficiais
The chemical dosimetry has been used as a reference in the measurement of the absorbed dose, with the Fricke dosimeter, at standardization laboratories. This dosimeter is considered an absolute dosimetric standard for measurements of radiation doses ranging from 20 to 400 Gy, covering a wide energy spectrum, from X-ray, g-ray to fast electron beam. The objec
Publicado em: 2006